MCP Server And Client
Explore the principle of the MCP architecture and practice building it, including the development of Client and Server components and the experimental process of connecting to LLM services
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What is MCP Server?
MCP Server is the implementation end of the Model Context Protocol, responsible for connecting your custom services (such as weather queries) with AI models (such as Claude). It serves as an intermediate bridge to handle communication between AI models and specific business logic.How to use MCP Server?
By configuring a JSON file to specify the service startup command, clients such as Claude can automatically discover and call your services. Services need to implement specific interface specifications.Applicable scenarios
Suitable for scenarios where AI capabilities need to be integrated with business systems, such as: - Real-time data query (weather/stocks) - Calls to enterprise internal systems - Customized AI function expansionMain features
Service integrationPackage any Java service into a tool that can be called by AI
Protocol standardizationUnify the communication protocol to support calls from multiple clients
Lightweight deploymentProvide services through a simple JAR package
Advantages and limitations
Advantages
Quickly AI-ize existing services
Support the decoupling of business logic and AI models
Simple configuration and low development threshold
Limitations
Currently only supports JDK17 and below
Need to follow specific interface specifications
Performance depends on the implementation of local services
How to use
Prepare service implementation
Develop and implement a Java service for business logic and package it into an executable JAR
Configure the client
Add service configuration in claude_desktop_config.json
Start the service
Restart the client to automatically connect to the service
Usage examples
Weather query serviceGet real-time weather information by city name
Data query serviceConnect to the enterprise internal database to provide business data
Frequently Asked Questions
Why doesn't it support JDK21?
How to debug the service?
Which clients are supported?
Related resources
MCP protocol documentation
Official protocol specification description
Example project repository
Example code for the weather service
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